You have to check your insurance police.  Most likely, you will have to pay for the 2nd one.  In my case, we transfered because the other detist is really bad, and insurance company agreed to pay for it, but you will have to call first to check.

谢谢你的回复...
已经cancel了第二个牙医的预约...
主要是昨天一个朋友说这个第2个医生做crown便宜.现在想想也就便宜了一点...还是算了,我之前的第一个牙医,怎么说也是我这边review最好的牙医..

就不折腾了,直接在第一个牙医那搞定吧....